352 Forty-fifth Report on the State Museum. 



" 25 Resembles Spirifer Walcottii. Probably near = Spirifer mac- 

 rojrfeura, Conrad." Lower Helderberg (Shaly limstone). 



26 missing. 



"27 A pentacrinite being the Encrinus dicyclus " = Crinoidal disks 

 from the Hamilton or Chemung group. 



" 28. Encrinus transversus " = Phytopsis tubulosa, Hall. 

 Birdseye limestone. 



Original description: 



" E. transversus (birdseye pins) rings low or confluent, so that the 

 column appears nearly or quite smooth; perforates strata transversely. 

 Found in the lowest and most compact layers of metalliferous limerock. 

 It is called Encrynal by Conybeare and Birdseye marble by stone- 

 cutters." ( Op. cit., p. 36.) 



" 29. Encrinus interruptus." Corniferous limestone. 



"30. Productus depressus in 2d Graywacke" = Leptcena rhom- 

 boidalis, Wilckens. Lower Helderberg (Shaty limestone). 



"31. Orthocera circularis " = Orthoctras sp.? probably from the 

 Corniferous limestone. (Op. cit., p. 29, pi. 3, fig. 27.) 



"32 Cancer triloboides Nobis" = Br ongniartia caroinodea, Eaton, 

 1832= Triarthrus Becki, Green, 1832. Utica slate. 



"33. Conularia quadrisulcata" = Conocardium trigoaale, Conrad. 

 " Cyathophyllum ceratites " — Zaphrentis sp.? 

 " Gorgonia ripisteria v ' = Polypora celsipora, Hall (?). 



II. The collection of Trilobites had been carefully labeled by the 

 late Dr. T. R. Beck, and though these labels were all displaced, the 

 numbering on both labels and specimens has facilitated their replace- 

 ment. This collection is composed of some small lots not included in 

 the serial numbering of the general collection, and a few embraced the 

 initiatory portion of the latter. 



1. Plaster-of-paris models of Trilobites described by Dr. Jacob 

 Green in his " Monograph of the Trilobites of North America," 

 1832. 

 No. 1, Calymene Blumenbachii, Brongniart, Trenton Falls. 

 No. 2, C. callicephala, Green, "Hampshire, Virginia." 

 No. 5, C. platys, Green, Helderberg (3 specimens). 

 No. 6, C. microps, Green, near Ripley, Ohio. (?) 

 No. 9, C. macrophthalma, Brongniart, Leheighton, Pa. 

 No. 10, C. Bufo, Green, New Jersey. 

 No. 17, Asaphus caudatus, Briinnich, Ripley, Ohio. 

 No. 28, Cryptolithus tesselatus, Green, Champlain canal. 

 No. 81, Dipleura DeKayi, Green, Northumberland, Pa. (?) 



